Microphone



FIG. 1 is a bottom plan view of a microphone showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof, the right side being a mirror image;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a front elevational view thereof. 

The ornamental design for a microphone, as shown and described. 